/*    
    OpenMheg - A free MHEG-5 library
    Copyright (C) 2008 Dharmesh Malam

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

using System;
using System.Collections.Generic;
using System.Text;
using Core.Model.Data.Type;
using Core.Model.Data.Variables;

namespace Core.Model.Data.Generics
{
    public class GenericContentRef : Generic
    {
        #region internal Attributes

        private ContentRef value;

        private ObjectRef indirectReference;

        
        public int NewContentSize { get; set; }

        public int NewContentCachePriority { get; set; }

        #endregion

        public GenericContentRef ( ContentRef data ):base()
        {
            value = data;
            indirectReference = null;
        }

        public GenericContentRef ( ObjectRef indirectReference ):base()
        {
            this.indirectReference = indirectReference;
            value =  null;
        }


        public ContentRef Value
        {
            get
            {
                ContentRef ret = null;

              //  try
           //     {
                    ret = value ?? ( ( ContentRefVariable ) Engine.MHEGEngine.Instance.Find( indirectReference ) ).Value;
             //   }
            //    catch ( InvalidCastException e )
            //    {
            //        log.Error( "Indirect value is not "+value.GetType()+", when trying to dereference"+GetType()+". Returning null.", e );
            //    }
            //    catch ( NullReferenceException e )
            //    {
            //        log.Error( "Direct and indriect value equal null when trying to dereference "+GetType()+".Returning null.", e );
            //    }

                return ret;
            }

            set
            {
                if ( this.value == null )
                {
                   // try
                   // {
                        ContentRefVariable contentRefVariable = ( ContentRefVariable ) Engine.MHEGEngine.Instance.Find( indirectReference );

                        if ( contentRefVariable != null )
                            contentRefVariable.Value =  value;
                        else
                        {
                            log.Error( "Set: Indirect reference ("+indirectReference+") does not exist. Setting direct.." );
                            this.value = value;
                            indirectReference = null;
                        }
                  //  }
                  //  catch ( InvalidCastException e )
                  //  {
                  //      log.Error( "Indirect value is not "+this.value.GetType()+", when trying to dereference"+GetType()+".", e );
                  //  }
                }
                else
                {
                    this.value = value;
                }
            }

        }

        public override string ToString ()
        {
            return Value.ToString() +" Direct:"+ ( value!=null ).ToString();
        }

    }
}
